JP2021074681A - Air filter cleaning device and showcase - Google Patents

Abstract

To provide an air filter cleaning device which can enhance cleaning efficiency, prevents increase in the size, and can surely remove dust attached to a filter body with a simple structure.SOLUTION: The air filter cleaning device 10 has a filter body 11 for capturing dust, a cleaning blade 12 which abuts on the surface of the filter body 11 and removes dust, and a movable mechanism 13 for moving the cleaning blade 12 from one end of the filter body 11 toward the other end thereof. The movable mechanism 13 performs reciprocating operation at predetermined distances a plurality of times while the filter body 11 is moved from the one end to the other end, and the cleaning blade 12 is formed with a deformation part 12a having a hollow shape deformed in inversion of the reciprocating operation.SELECTED DRAWING: Figure 3

Description

The present invention relates to an air filter cleaning device for removing dust adhering to a filter with a cleaning blade, and a showcase provided with the air filter cleaning device.

Conventionally, an air filter cleaning device for removing dust and the like adhering to a filter has been known (Patent Document 1).

The air filter cleaning device of Patent Document 1 has a cleaning operation in which the cleaning body of the cleaning unit is moved in a predetermined direction while being in contact with the filter, and a cleaning unit is moved in a direction opposite to the predetermined direction during the cleaning operation and adheres to the cleaning body. The dust collection operation for collecting the collected dust to the collection mechanism is performed, and the position of the first dust collection operation during the first cleaning operation and the second cleaning operation performed after the first cleaning operation are performed. The position of the second dust collecting operation was set to a different position, and the first dust collecting operation and the second dust collecting operation reciprocated the cleaning body within a predetermined range.

Japanese Patent No. 6476106

The air filter cleaning device described in Patent Document 1 reciprocates the cleaning body within a predetermined range by the first dust collecting operation and the second dust collecting operation, so that it is possible to reduce the amount of dust left behind. It was intended to improve cleaning efficiency.

However, since the cleaning unit is provided with a collection box for collecting dust, the cleaning unit becomes large and complicated. Further, when the capacity of the collection box is small, the frequency of removing dust from the collection box is high.

Furthermore, since a rotating brush is used for the cleaning body, a drive device for rotating the rotating brush is required, and the rotation direction of the rotating brush changes between the outward path and the return path of the cleaning body, so that the rotating brush is made to correspond to the rotation direction. It required two types of brushes with different tilt directions.

The present invention solves the above-mentioned conventional problems, and can improve cleaning efficiency and can surely remove dust adhering to the filter body with a simple structure without increasing the size of the air. It is an object of the present invention to provide a filter cleaning device and a showcase equipped with the air filter cleaning device.

In order to solve the conventional problem, the invention of claim 1 uses a filter body for capturing dust, a cleaning blade that comes into contact with the surface of the filter body to remove dust, and the cleaning blade. In an air filter cleaning device having a movable mechanism for moving from one end to the other end of the filter body, the movable mechanism performs a reciprocating movement operation of a predetermined distance a plurality of times during the movement from one end to the other end of the filter body. The cleaning blade is characterized in that a hollow deformed portion that is deformed when the reciprocating movement operation is reversed is formed.

In the invention of claim 1, the cleaning efficiency can be improved and dust can be reliably removed by performing the reciprocating movement operation of a predetermined distance a plurality of times while the cleaning blade moves from one end to the other end of the filter body. can do. Further, by forming a hollow deformed portion on the cleaning blade, it can be deformed at the time of reversing the reciprocating movement operation, so that the friction between the cleaning blade and the filter body is reduced by a simple structure and the cleaning blade is smoothly reversed. Can be made to.

The invention of claim 2 is the invention of claim 1, wherein the deformed portion of the cleaning blade has a substantially arcuate outer shape, and the outer surface continuously contacts the filter body when the reciprocating movement operation is reversed. It is a feature. Therefore, the friction between the cleaning blade and the filter body can be reduced and the reversal can be performed more smoothly.

The invention of claim 3 is the invention of claim 1 or 2, wherein the deformed portion of the cleaning blade is an outer surface, and cleaning protrusions are provided on the outward path side and / or the return path side during the reciprocating movement operation. It is characterized by. Therefore, dust on the surface of the filter body can be efficiently removed, and the entire deformed portion can be smoothly inverted without slipping on the filter body.

The invention of claim 4 is characterized in that, in any of the inventions of claims 1 to 3, the deformed portion of the cleaning blade is provided with a rotation assisting projection at the tip thereof to assist rotation. Therefore, the entire deformed portion can be reversed more smoothly without slipping on the filter body.

The invention of claim 5 is characterized in that, in any of the inventions of claims 1 to 4, the cleaning blade has a deformed portion formed up to the vicinity of the root. Therefore, since the deformed portion is deformed from the vicinity of the root so as to be located on the rear side with respect to the traveling direction, the cleaning blade does not excessively press the filter body, and dust adhering to the filter body is removed. It can be scraped out in the direction of travel as a lump of dust.

The invention of claim 6 is characterized in that, in any of the inventions of claims 1 to 5, a support member is formed on the return path side of the cleaning blade during the reciprocating movement operation so as to come into contact with the deformed portion only during the outward path. It is supposed to be. Therefore, the support member makes the cleaning blade strongly and surely abut on the filter body on the outward trip, and the cleaning blade weakly abuts on the filter body on the return trip, thereby improving the cleaning effect on the outward trip and the filter body on the return trip. The pressure on the body can be reduced.

The invention of claim 7 is an invention of a showcase, which comprises a gantry, a cover panel provided with a vent hole provided on the front surface side of the gantry, and a condenser provided on the downstream side of the cover panel. It is characterized by having a blower fan for sending air to the condenser and an air filter cleaning device according to any one of claims 1 to 6 arranged between the condenser and the cover panel. Therefore, it is possible to provide a showcase provided with an air filter cleaning device capable of reliably removing dust adhering to the filter body with a simple structure.

The invention of the air filter cleaning device according to claim 1 can improve cleaning efficiency and reliably remove dust. Further, according to the inventions of claims 1 and 2, the friction between the cleaning blade and the filter body can be reduced and the surface can be smoothly reversed with a simple structure. Further, in the inventions of claims 3 and 4, the entire deformed portion can be smoothly inverted without slipping on the filter body.

According to the fifth aspect of the present invention, the dust adhering to the filter body can be scraped out as a twisted mass in the traveling direction. Further, in the invention of claim 6, the cleaning blade can be strongly and surely brought into contact with the filter body on the outward trip by the support member. Further, the invention of the showcase according to claim 7 can provide a showcase provided with an air filter cleaning device capable of reliably removing dust adhering to the filter body with a simple structure.

Perspective view of the showcase according to the present invention Perspective view of the air filter cleaning device according to the present invention Cross-sectional view showing two types of path patterns of the internal mechanism of the air filter cleaning device and the cleaning blade according to the present invention. Partial sectional view showing the internal mechanism of the air filter cleaning device which concerns on this invention. (A)-(c) Partial sectional view showing a cleaning state of the air filter cleaning device according to the present invention. Perspective view showing an air conditioner

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment. FIG. 1 is a perspective view showing a showcase according to the present invention. The showcase of the present invention will be described below with reference to this figure.

The showcase 1 according to the present invention includes a box-shaped showcase main body 2 and a gantry 3 provided below the showcase main body 2 and accommodating a refrigerant circuit for generating cold air supplied into the showcase main body 2. It is composed of. The showcase main body 2 has a product storage 4 having an opening 4b having a display shelf 4a for displaying food and the like, a night cover 8 that can be opened and closed so as to cover the opening 4b, and cold air generated by a refrigerant circuit. An outlet (not shown), a suction port (not shown) in which the cold air blown out from the outlet is sucked in after passing through the display shelf 4a, and an LED lamp (not shown) that illuminates the display shelf 4a. I have. The cold air sucked in from the suction port is returned to the refrigerant circuit and blown out from the outlet again. Further, the showcase 1 may have either a refrigerating function or a freezing function, and may have either a flat shape or a tabletop shape.

A removable cover panel 5 is attached to the front surface of the gantry 3, and inside the gantry 3, a compressor (not shown), a condenser 6, an evaporator (not shown), and a refrigerant constituting the refrigerant circuit are provided. An electrical box (not shown) containing a substrate for controlling circuits, fluorescent lamps, etc. is arranged. A plurality of ventilation holes 7 for supplying outside air to the condenser 6 are formed at a portion of the cover panel 5 facing the condenser 6. Further, behind the condenser 6, a blower fan (not shown) that supplies outside air to the condenser 6 via a ventilation hole 7 is arranged. In addition, wheels 9, 9, ... Are installed in the lower part of the gantry 3 to make the showcase 1 movable.

Further, between the cover panel 5 on which the ventilation holes 7 are formed and the condenser 6, a filter body (see FIG. 2) that collects dust contained in the outside air supplied to the condenser 6 and a filter body are provided. An air filter cleaning device (see FIG. 2) having a cleaning blade (see FIG. 3) for removing the adhering dust is provided. The gantry 3 including the air filter cleaning device may be attached to the lower part of the showcase main body 2 as shown in FIG. 1 or may be attached to the upper part of the showcase main body 2 (not shown). Further, the showcase of the present invention has a structure in which dust adhering to the filter body is scraped off by a cleaning blade and then dropped on the floor. A dust box is provided below the gantry 3 to store the dust in the dust box. This is also included in the present invention.

FIG. 2 is a perspective view of the air filter cleaning device according to the present invention, and FIG. 3 is a cross-sectional view showing two types of path patterns of the internal mechanism of the air filter cleaning device according to the present invention and the cleaning blade. The air filter cleaning device of the present invention will be described below with reference to these figures.

The air filter cleaning device 10 according to the present invention uses a filter body 11 that captures dust, a cleaning blade 12 that comes into contact with the surface of the filter body 11 to remove dust, and the cleaning blade 12 at one end of the filter body 11. It has a movable mechanism 13 that moves toward the other end.

The movable mechanism 13 performs a reciprocating movement operation of a predetermined distance a plurality of times during the movement from one end to the other end of the filter body 11, and the cleaning blade 12 has a hollow shape that deforms when the reciprocating movement operation is reversed. The deformed portion 12a is formed.

The movable mechanism 13 is composed of a stepping motor 14, gears 15a and 15b, and a timing belt 16, and the rotation of the stepping motor 14 rotates the gear 15a directly connected to the rotation shaft of the stepping motor 14. It is moved to rotate the gear 15b that meshes with the gear 15a. The gear 15b is directly connected to one of the rotation shafts of the timing belt 16, and the rotation of the timing belt 16 causes the cleaning blade 12 provided on the filter body side of the base 12c fixed to the timing belt 16. In the drawing, it has a structure that can be moved in the vertical direction. A micro switch (not shown) is provided on the frame near the movable start end and the movable end of the cleaning blade 12, and when the base 12c of the cleaning blade 12 comes into contact with the micro switch, the cleaning blade is at the movable end. A signal for rotating the timing belt 16 in the direction of moving the 12 upward is sent to the stepping motor 14, and when the base 12c abuts on the microswitch when the movable start end is reached, a signal for stopping the rotation of the timing belt 16 is sent. The structure is such that it is sent to the stepping motor 14.

The route pattern (X) on the left side of FIG. 3 is a route pattern when the reciprocating movement operation is performed a plurality of times at a fixed distance, and the route pattern (Y) on the right side of FIG. This is a path pattern in which a short-distance reciprocating movement is performed and a long-distance reciprocating movement is performed as the cleaning ends (downward side). In the case of the path pattern (X), the cleaning blade 12 reciprocates at least twice on the surface of the filter body 11 to scrape off the dust, so that the dust can be reliably transferred without being left behind. On the other hand, in the case of the path pattern (Y), the dust adhering to the filter body 11 is light cotton-like and is always in a state of being stuck by the blower fan. Although it is difficult to transfer the dust to a certain amount of dust, it becomes easy to transfer the dust downward by the cleaning blade 12. Therefore, the outward distance is lengthened (the return distance is constant) as it advances downward from the filter body 11 in which a large twisted mass is formed, and the cleaning time and the load on the filter body are reduced.

The path pattern can be arbitrarily set by the control circuit that controls the number of steps of the stepping motor 14 described above. For example, a path pattern in which the reciprocating reversal distance at the beginning of cleaning is lengthened and gradually shortened, or a path pattern in which the reciprocating reversal distance in the central portion is shortened when there is a large amount of dust adhering to the central portion of the filter body 11. Can be.

Further, a plurality of combs 17, 17, ... Are installed below the filter body 11 at predetermined intervals. Further, an opening 18 is formed on the lower bottom surface of the timing belt 16. Then, the dust that has been removed from the filter body 11 and has become twisted is separated from the cleaning blade 12 by the comb 17 and is dropped from the opening 18 to the floor surface on which the showcase is installed.

FIG. 4 is a partial cross-sectional view showing the internal mechanism of the air filter cleaning device according to the present invention, and FIGS. 5 (a) to 5 (c) are partial cross-sectional views showing a cleaning state of the air filter cleaning device according to the present invention. .. The cleaning operation of the air filter cleaning device of the present invention will be described below with reference to these figures.

As shown in FIG. 4, the initially movable cleaning blade 12 is in contact with the upper surface of the filter body 11, the deformed portion 12a is deformed, and the traveling direction (downward in the drawing) from the position of the root 12b. ) Is bent backward. Further, the deformed portion 12a is formed up to the vicinity of the root 12b, has a substantially arcuate outer shape, and has a configuration in which the outer surface continuously contacts the filter body 11 when the reciprocating movement operation is reversed. Further, the cleaning blade 12 is formed with a support member 19 that comes into contact with the deformed portion 12a only on the outward path on the return path side during the reciprocating movement operation. The support member 19 is formed with a curved surface that curves on the return path side, so that the deformed portion 12a of the cleaning blade 12 can be reliably brought into contact with the filter body 11 on the outward path.

The deformed portion 12a of the cleaning blade 12 has an outer surface, and cleaning protrusions 12d and 12e are provided on the outward path side and the return path side during the reciprocating movement operation. The cleaning protrusions 12d and 12e have a function of allowing the entire deformed portion 12a to be smoothly inverted without slipping on the filter body 11. Further, it is desirable to move the cleaning protrusion 12e in contact with the filter body 11 on the outward route, and the cleaning effect can be enhanced by appropriately designing the distance between the cleaning blade 12 and the filter body 11. Furthermore, it is desirable that the shape of the support member 19, the material of the deformed portion 12a, and the position of the cleaning protrusion 12e on the deformed portion 12a are appropriately designed so that the cleaning protrusion 12e is brought into contact with the filter body 11. It should be noted that a cleaning protrusion 12d or 12e may be provided on either the outward path side or the return path side, which is also included in the present invention. Further, the deformed portion 12a is provided with a rotation assisting protrusion 12f at the tip thereof to assist the rotation, and the rotation assisting protrusion 12f also has the function of the cleaning protrusion described above. When reversing from the outward movement to the return movement, the rotation auxiliary projection 12f allows the entire deformed portion 12a to be smoothly reversed without slipping on the filter body 11.

The movable end cleaning blade 12 is located in the vicinity of the comb 17, as shown in FIG. Since the deformed portion 12a removes the dust 23a adhering when passing through the comb 17 and is released from the contact with the filter body 11, the deformed portion 12a is bent rearward with respect to the traveling direction. It moves forward in the direction of travel, and by this movement, the dust 23b, which is a lump of combs, is blown off and falls from the inclined surface 24 to the opening 18 shown in FIG. The hollow-shaped deformed portion 12a has a circular cross section in FIG. 4 in a non-deformed state, but the present invention is not limited to this. Shapes can be adopted, and deformed portions of these shapes are also included in the present invention.

FIG. 5A shows the cleaning blade 12 at the end position of the outward path during the reciprocating movement operation. In this state, the support member 19 functions to ensure that the deformed portion 12a of the cleaning blade 12 is in contact with the filter body 11, and the deformed portion 12a is bent rearward with respect to the traveling direction. The cleaning protrusion 12e is located near the point A of the filter body 11, and the rotation auxiliary protrusion 12f is located near the point A of the filter body 11. The dust 23a scraped off by the cleaning protrusion 12e becomes a twist-like mass (dust 23b) and is transferred below the point A of the filter body 11. Then, the dust 23c left behind by the cleaning protrusion 12e remains thinly between the points A and B. In the vicinity of the end position of the outward path, dust begins to adhere to the tip of the cleaning protrusion 12e little by little, so that the force for scraping the dust (friction force) weakens and the dust 23c is left behind. The rotation auxiliary protrusion 12f has a function of a cleaning protrusion, and dust left behind by the cleaning protrusion 12e is scraped off from the filter body 11. Further, when reversing, the support member 19 described above presses the deformed portion 12a toward the filter body 11 so that the entire deformed portion 12a including the rotation assisting protrusion 12f and the cleaning protrusion 12e does not slip on the filter body 11. doing. Here, the shape of the deformed portion 12a is not particularly limited, but by making the outer surface substantially arcuate, the filter body 11 can be brought into contact with the filter body 11 more continuously and smoothly. Further, by making the outer shape substantially circular or substantially elliptical, it can be inverted more smoothly.

FIG. 5B shows the cleaning blade 12 at the end position of the return path during the reciprocating movement operation. In this state, since there is no support member on the outward path side, the deformed portion 12a is less deformed and is bent rearward from the root 12b of the cleaning blade 12 in the traveling direction. Further, the cleaning blade 12 is stopped after the cleaning protrusion 12d is inverted to a position where it comes into contact with the filter body 11 and then further moved to the return path side. At this time, the dust left behind by the rotation assisting protrusion 12f and the cleaning protrusion 12e is scraped off from the filter body 11 to raise the dust.

FIG. 5C shows the cleaning blade 12 at the outbound route start position during the reciprocating movement operation. In this state, the dust 23c left thinly between the points A and B on the filter body 11 left behind in the state of FIG. 5A is scraped off by the cleaning protrusion 12e and transferred downward. , It is absorbed by the dust 23a, which is a lump of twist. Therefore, the return path end position shown in FIG. 5B moves the cleaning projection 12e of the cleaning blade 12 to the return path side at least to a position where it abuts on the point B of the filter body 11.

In the air filter cleaning device according to the present invention, as shown in FIGS. 5A to 5C, the cleaning blade 12 passes through the same surface of the filter body 11 twice or more by the reciprocating movement of the movable mechanism. Therefore, the dust left behind in the first time can be reliably scraped off in the second and subsequent times.

FIG. 6 is a perspective view showing an air conditioner. The air filter cleaning device according to the present invention described above can be used by being mounted on an air conditioner. The air conditioner 20 has an air intake port 21a formed in a grid pattern on the back panel 21, and has a main body 20a having an air passage (not shown) for guiding the air sucked from the air intake port 21a to the air outlet 22. In the main body 20a, a main filter (not shown), a blower fan (not shown), and an air filter cleaning device (not shown) for removing dust adhering to the filter body (pre-filter) are installed. I have.

The air filter cleaning device according to the present invention is used by being mounted on a showcase or an air conditioner. Further, the showcase according to the present invention is installed and used in a store such as a supermarket or a convenience store.

1 Showcase 2 Showcase body 3 Stand 4 Product storage 4a Display shelf 4b Opening 5 Cover panel 6 Condenser 7 Vent hole 8 Night cover 9 Wheel 10 Air filter cleaning device 11 Filter body 12 Cleaning blade 12a Deformed part 12b Root 12c base Base 12d, 12e Cleaning protrusion 12f Rotation auxiliary protrusion 13 Movable mechanism 14 Stepping motor 15a, 15b Gear 16 Timing belt 17 Cush 18 Opening 19 Support member 20 Air conditioner 20a Main body 21 Rear panel 21a Air intake port 22 Air outlet 23a, 23b , 23c Dust 24 Inclined surface

Claims (7)

A filter body that captures dust and
A cleaning blade that comes into contact with the surface of the filter body to remove dust, and
In an air filter cleaning device having a movable mechanism for moving the cleaning blade from one end to the other end of the filter body.
The movable mechanism performs a reciprocating movement operation of a predetermined distance a plurality of times during the movement from one end to the other end of the filter body.
The cleaning blade is an air filter cleaning device characterized in that a hollow deformed portion that deforms when the reciprocating movement operation is reversed is formed. The air filter cleaning device according to claim 1, wherein the deformed portion of the cleaning blade has a substantially arcuate outer shape, and the outer surface continuously contacts the filter body when the reciprocating movement operation is reversed. The air filter cleaning device according to claim 1 or 2, wherein the deformed portion of the cleaning blade is an outer surface, and cleaning protrusions are provided on the outward path side and / or the return path side during the reciprocating movement operation. .. The air filter cleaning device according to any one of claims 1 to 3, wherein the deformed portion of the cleaning blade is provided with a rotation assisting protrusion for assisting rotation at the tip thereof. The air filter cleaning device according to any one of claims 1 to 4, wherein the cleaning blade has a deformed portion formed up to the vicinity of the root. The air filter cleaning device according to any one of claims 1 to 5, wherein the cleaning blade is formed with a support member that comes into contact with the deformed portion only on the outward path on the return path side during the reciprocating movement operation. .. With the gantry
A cover panel with ventilation holes provided on the front side of the gantry and
A condenser provided on the downstream side of the cover panel and
A blower fan that sends air to the condenser,
A showcase comprising the air filter cleaning device according to any one of claims 1 to 6, which is arranged between the condenser and the cover panel.

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